Intended use
Pumps for heating/air conditioning/cooling applications
Stratos MAXO/-D series smart-pumps are intended to circulate fluids in the following application areas:
- Hot-water heating systems
- Cooling and cold water circulation systems
- Closed industrial circulation systems
- Solar installations
- Geothermal systems
- Air-conditioning systems
The pumps do not fulfil the requirements of the ATEX directive and are not suitable for pumping explosive or easily flammable fluids!
Intended use includes compliance with these instructions as well as the information and markings on the pump.
Any use beyond the intended use is considered misuse and will void any warranty claims.
Permitted fluids
Heating pumps:
- Heating water in accordance with VDI 2035 part 1 and part 2
- Demineralized water in accordance with VDI 2035-2, “Water quality” section
- Water-glycol mixtures, max. mixing ratio of 1:1
- If glycol is added, the pumping data of the pump must be corrected according to the higher viscosity, depending on the mixing ratio percentage.
- Ethylene/propylene glycol with corrosion inhibitors.
- No oxygen binding agents, no chemical sealants (ensure system is closed in terms of corrosion according to VDI 2035); fix leaky spots.
- Commercially available corrosion protection agents1) without corrosive anodic inhibitors (underdosing due to consumption!).
- Commercially available combination products1) without inorganic or polymer film formers.
- Commercially available cooling brines1).
WARNING
Personal injury and material damage caused by impermissible fluids!
Impermissible fluids can damage the pump and also cause personal injury.
1) Add additives to the fluid on the pressure side of the pump, even if this is contrary to the recommendations of the additive manufacturer.
- Use only branded products with corrosion protection inhibitors!
- Comply with the chloride content of the top-up water according to the manufacturer’s instructions! Chloride containing soldering pastes are not permitted!
- Follow the safety data sheets and manufacturer’s instructions!
Salty fluids
CAUTION
Material damage due to salty fluids!
Salty fluids (e.g. carbonates, acetates or formates) are very corrosive and can damage the pump!
- Fluid temperatures above 40 °C are not permitted for salty fluids!
- Use a corrosion inhibitor and constantly check its concentration!
NOTICE
Use other fluids only after approval by WILO SE.
CAUTION
Material damage can occur due to the accumulation of chemicals!
When changing, refilling or replenishing the fluid with additives, there is a risk of material damage caused by the accumulation of chemicals.
- Rinse the pump separately and thoroughly. Ensure the old fluid has been completely removed from the interior of the pump!
- Remove pump before change in pressure flushes!
- For chemical flushing measures:
- Remove the pump from the system for the duration of cleaning!
Drinking water pumps:
WARNING
Health hazard due to fluids not approved for drinking water!
Because of the materials used, pumps of the Stratos MAXO/ -D series are unsuitable for use in applications involving drinking water or foodstuffs.
The smart-pumps of the Stratos MAXO-Z series are specially adapted to the operating conditions in domestic hot water circulation systems through the selection of materials and their design, taking into account the guidelines of the German Environment Agency (UBA):
- Drinking water acc. to EC Drinking Water Directive.
- Clean, non-aggressive, low-viscosity fluids in accordance with national drinking water provisions.
CAUTION
Property damage due to chemical disinfectants!
Chemical disinfectants can result in damage to material.
- Comply with the specifications of DVGW-W557! Or:
- Remove the pump for the duration of the chemical disinfection process!
Permitted temperatures
| Stratos MAXO/-D | Stratos MAXO-Z |
|---|---|---|
Fluid temperature | -10 °C to +110 °C | 0 °C to +80 °C |
Ambient temperature | -10 °C to +40 °C | 0 °C to +40 °C |